Hiro meets a mysterious carnival man 14 years in the past, and is prompted to change history. Noah calls on Peter to help pursue a lead from Danko, and runs afoul of a knife-wielding speedster from the carnival. Matt Parkman is confronted by a piece of Sylar in his mind, and Claire is stunned when someone close to her appears to have been murdered.
U.S. air dates are in MM.DD.YY form. U.K. air dates are in DD.MM.YY form.